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Integral inductor and preparation method thereof

A manufacturing method and inductor technology, applied in the direction of transformer/inductor coil/winding/connection, coil manufacturing, etc., can solve problems such as stab wounds and short circuits, and achieve the effect of preventing quality risks

Inactive Publication Date: 2009-03-04
HENGDIAN GRP DMEGC MAGNETICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above technical solution has disadvantages such as the lead wire at one end of the coil intersects with the coil, and the lead wire will stab the coil under the influence of pressure during molding, resulting in potential quality problems such as short circuit.

Method used

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  • Integral inductor and preparation method thereof
  • Integral inductor and preparation method thereof
  • Integral inductor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The integrated inductor 1 , as shown in FIG. 1 , includes two terminals 3 protruding from the magnetic powder block. The terminals 3 are flat, and their larger planes are parallel to the larger plane of the magnetic powder block. Among them, the coil body of the inductance coil 2 is completely wrapped in the magnetic powder block, and the coil body adopts a bidirectional helical structure, that is, the coil body of the inductance coil starts from the center and winds one circle to both ends in the axial direction, and then coils to the center. 1 circle around. Its product size is 10.0×10.0×4.0mm, and its production process is as follows:

[0037] A) The coil adopts flat enameled wire coil

[0038] B) The metal powder is pure iron powder. In order to obtain better electrical characteristics and mechanical strength, the metal powder is insulated with phosphoric acid. Adhesive, the addition amount is 1% Wt. Zinc stearate was added as a lubricant in an amount of 0.1% Wt....

Embodiment 2

[0045] The product size is 10.0×10.0×4.0mm, and the production process is as follows:

[0046] A) The coil adopts a round enameled wire coil

[0047] B) The metal powder is pure iron powder. In order to obtain better electrical properties and mechanical strength, the metal powder is insulated with a silane coupling agent. Amide resin is used as a binder, and the addition amount is 8% Wt. Zinc stearate was added as a lubricant in an amount of 0.5% Wt.

[0048] C) Using a 25T multi-stage step formwork press, place the coil produced in step A) in the equipment coil device, add the metal powder produced in step B) to the equipment hopper, press the molding unit pressure 80KN in a jogging manner / cm2, magnetic core compression density 6.2g / cm3 Adjust the size and weight of the product until the size, weight, and electrical special electrical characteristics meet the set requirements.

[0049] D) The semi-finished product made in step C) is baked to cure the adhesive and release ...

Embodiment 3

[0055] The product size is 10.0×10.0×4.0mm, and the production process is as follows:

[0056] A) The coil adopts flat enameled wire coil

[0057] B) The metal powder is alloy iron powder. In order to obtain better electrical properties and mechanical strength, the metal powder is insulated with sodium silicate and silane coupling agent, and the addition amount is 3% Wt. The metal powder that has been insulated Then add phenolic resin as adhesive, the addition amount is 6%wt. Zinc stearate was added as a lubricant in an amount of 0.3% Wt.

[0058] C) Using a 25T multi-stage step formwork press, place the coil produced in step A) in the equipment coil device, add the metal powder produced in step B) to the equipment hopper, and press the forming unit pressure 70KN by jogging / cm2, magnetic core compression density 5.9g / cm3 Adjust the size and weight of the product until the size, weight, and electrical special electrical characteristics meet the set requirements.

[0059] D)...

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Abstract

The invention relates to an integrated type inductor and a manufacture method thereof. The inductor includes a press forming metal magnetic powder block and an inductance coil which comprises a coil body and two terminals; the coil body is formed by a metal enameled wire and is internally embedded in the metal magnetic powder block; the terminals are respectively positioned outside two sides of the metal magnetic powder block; and the coil body is a two-way spiral structure. The invention also provides a manufacture method of the inductor. The inductor which can be widely used in various circuits has the advantages of small volume, high efficiency, large saturation current, wide frequency, and steady product quality.

Description

technical field [0001] The invention relates to an integrated inductor and a manufacturing method thereof. Background technique [0002] Electronic and electrical products are becoming smaller and more multifunctional. The electronic components market is showing a trend of small size and high efficiency. The integrated inductor is small in size, high in efficiency, large in saturation current, wide in frequency characteristics, low in noise, and high inductance. Due to its superior features such as low DCR in the case, it is widely used in small-sized, high-power power supplies, energy storage inductors, high-current online power converters, distributed line DC / DC converters, notebook computers, desktop computers, servers and other fields. The publication number is CN1862720A Chinese patent application discloses a coil embedded inductor and its manufacturing method. The coil is embedded in the metal magnetic powder body. The coil is composed of a winding part and a lead term...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F27/28H01F41/04
Inventor 张宋国郭哓东何俊
Owner HENGDIAN GRP DMEGC MAGNETICS CO LTD
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